The United Railroads Powerhouse at Valencia and Market, 1880s.
Powerhouse ruins after 1906 earthquake and fire, Haight Street in distance.
Photo: San Francisco MTA
Powerhouse after 1906 earthquake, June 18, 1906.
Photo: San Francisco MTA, U00781
Sanborn insurance map, 1905, showing intersection of Valencia and Market and surroundings, with United Railroads powerhouse and carbarn in center.
Atlas rail grinder at the Market and Valencia shops, February 28, 1919.
Photo: San Francisco MTA, U06455